Re: [PATCH] bring netbsd/arm support up to speed. eabi, etc.

[coypu at sdf dot org]

Thanks for the detailed response.
Sorry to give only a partial reply.

On Tue, Oct 23, 2018 at 02:36:57PM +0100, Richard Earnshaw (lists) wrote:
> Thanks for posting this.  Before we can commit it, however, we need to
> sort out the authorship and ensure that all the appropriate copyright
> assignments are in place.  Are you the sole author, or are other NetBSD
> developers involved?

The authors of these patches to netbsd are:
- matt thomas
- nick hudson
- matthew green

They are all listed in MAINTAINERS files in FSF projects so I think they
have a copyright assignment on file.
Matt Thomas is unresponsive lately but I can ask someone to bug him in
person.

> > +/* Default to full VFP if -mhard-float is specified.  */
> > +#undef SUBTARGET_ASM_FLOAT_SPEC
> > +#define SUBTARGET_ASM_FLOAT_SPEC	\
> > +  "%{mhard-float:%{!mfpu=*:-mfpu=vfp}}   \
> > +   %{mfloat-abi=hard:%{!mfpu=*:-mfpu=vfp}}"
> 
> Please rework this to use -mfpu=auto.  -mfpu=vfp is very rarely the
> right setting to use.

This change seems scary. Going over my default CPUs, I guess the
problematic one might cortex-a8.
I'm worried it might have negative repercussions for VFPv3-d16.
Is that a valid concern?
I see generic-armv7-a is a more popular default CPU, but I am not sure
from reading the code that it avoids this problem.

Thanks.